It can be divided into perforated trays, non-perforated trays, ladder racks and assembled trays.
(1) The perforated tray is a grooved part composed of a bottom plate and a side plate with holes, or a part made of a whole piece of steel plate punched and then bent.
(2) The non-porous tray is a grooved part composed of the bottom plate and the side or made of a whole piece of steel plate.
(3) The ladder frame is a trapezoidal component composed of sides and several transverse blocks.
(4) Assembled pallets are parts that are connected to pallets by bolts or plug-in methods of perforated parts suitable for any combination on the project site. Bridges are used for laying cables. When low-voltage cables and control cables share the same tray or ladder, a ladder or tray with a partition in the middle should be used.
